picocom before 2.0 has a command injection vulnerability in the 'send and receive file' command because the command line is executed by /bin/sh unsafely.
https://lists.debian.org/debian-lts-announce/2020/06/msg00030.html
https://github.com/npat-efault/picocom/commit/1ebc60b20fbe9a02436d5cbbf8951714e749ddb1